Packaging blank



FIG. 1 is an upper perspective view of a packaging blank showing my new design in accordance with a first embodiment of the invention;

FIG. 2 is a top view thereof;

FIG. 3 is an upper perspective view of a packaging blank showing my new design in accordance with a second embodiment of the invention;

FIG. 4 is a top view thereof;

FIG. 5 is an upper perspective view of a packaging blank showing my new design in accordance with a third embodiment of the invention; and,

FIG. 6 is a top view thereof.

Broken lines in the drawings depict fold lines and form part of the claimed design. 

CLAIM The ornamental design for a packaging blank, as shown and described. 